August weather forecast
Roseau, Dominica

A calm, clear waterfront in the valley city of Roseau, Dominica
A calm, clear waterfront in the valley city of Roseau, Dominica

Weather in August

August, the last month of the summer in Roseau, is also a hot month, with an average temperature fluctuating between 24°C (75.2°F) and 31°C (87.8°F).

Temperature

The warmest months are May through October, with an average high-temperature of 31°C (87.8°F).

Rainfall

In Roseau, during August, the rain falls for 20 days and regularly aggregates up to 246mm (9.69") of precipitation. Throughout the year, there are 218 rainfall days, and 1996mm (78.58") of precipitation is accumulated.

Sea temperature

In Roseau, the average seawater temperature in August is 28°C (82.4°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In August, the average length of the day in Roseau is 12h and 37min.
On the first day of the month, sunrise is at 05:47 and sunset at 18:35. On the last day of August, sunrise is at 05:52 and sunset at 18:18 AST.

Sunshine

March through August, with an average of 8h of sunshine, are months with the most sunshine.

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an excessive health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 12 in August transform into the following instructions:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the warmest month in Roseau?

May through October, with an average high-temperature of 31°C (87.8°F), are warmest months.

What is the temperature in August in Roseau?

The average high-temperature, in August, in Roseau, Dominica, is 31°C (87.8°F), while the average low-temperature is 24°C (75.2°F).

How much does it rain in Roseau in August?

In Roseau, Dominica, in August, during 20 rainfall days, 246mm (9.69") of precipitation is typically accumulated.

How warm is the water in August in Roseau?

In August, the average sea temperature in Roseau is 28°C (82.4°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in August in Roseau?

The average day length in August in Roseau, Dominica, is 12h and 37min.

When is the sunrise / sunset in August in Roseau?

On the first day of August in Roseau, sunrise is at 05:47 and sunset at 18:35. On the last day of the month, sunrise is at 05:52 and sunset at 18:18 AST.

What are the months with the most sunshine in Roseau?

March through August, with an average of 8h of sunshine, are months with the most sunshine.

How long on average sun shines in August in Roseau?

In August, the average sunshine duration in Roseau, Dominica, is 8h.

What are the months with the highest UV index in Roseau?

March through September, with an average maximum UV index of 12, are months with the highest UV index.

What is the UV index reading in August in Roseau?

The average daily maximum UV index in August in Roseau is 12. A UV Index reading of 11, and higher, represents an excessive health risk from exposure to the Sun's UV radiation.
Average rainfall days
Average sunshine
Average UV index

Average temperature in August
Roseau, Dominica

Average temperature in August - Roseau, Dominica
  • Average high temperature in August: 31°C

The warmest months (with the highest average high temperature) are May, June, July, August, September and October (31°C).
The months with the lowest average high temperature are January, February and December (29°C).

  • Average low temperature in August: 24°C

The month with the highest average low temperature is August (24°C).
The coldest months (with the lowest average low temperature) are January, February, March and December (21°C).

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Average rainfall in August
Roseau, Dominica

Average rainfall in August - Roseau, Dominica
  • Average rainfall in August: 246mm

The wettest month (with the highest rainfall) is November (252mm).
The driest months (with the least rainfall) are February and April (87mm).

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Average rainfall days in August
Roseau, Dominica

Average rainfall days in August - Roseau, Dominica
  • Average rainfall days in August: 20 days

The month with the highest number of rainy days is September (23 days).
The months with the least rainy days are February and April (14 days).

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Average sea temperature in August
Roseau, Dominica

Average sea temperature in August - Roseau, Dominica
  • Average sea temperature in August: 28°C

The best months for swimming (with the highest average sea temperature) are September and October (29°C).
The coldest months (with the lowest average sea temperature) are February and March (26°C).

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Average daylight in August /
Average sunshine in August
Roseau, Dominica

Average daylight in August / Average sunshine in August - Roseau, Dominica
  • Average daylight in August: 12h and 37min

The month with the longest days is June (Average daylight: 13h and 1min).
The month with the shortest days is December (Average daylight: 11h and 14min).

  • Average sunshine in August: 8h

The months with the most sunshine are March, April, May, June, July and August (Average sunshine: 8h).
The months with the least sunshine are January, February, September, October, November and December (Average sunshine: 7h).

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Average UV index in August
Roseau, Dominica

Average UV index in August - Roseau, Dominica
  • Average UV index in August: 12

The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 8).

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